Slidable barrel gun with a combined sear and cocking member



M. MAERK May 27, 1958 SLIDABLE BARREL GUN WITH A COMBINED SEAR AND COCKING MEMBER Original Filed April 22. 1952 3 Sheets-Sheet 1 SLIDABLE BARREL GUN WITH A COMBINED sEAR lmp cocKING MEMBER original Filed April 22, 1952 M. MAERK May 27, 195s 3 Sheets-Sheet 2 M. MAERK May 27, 1958 SLIDABLE BARREL GUN WITH A COMBINED SEAR AND COCKING MEMBER 3 Sheets-Sheet 5 Original Filed April 22. 1952 nited SLIDABLE BARREL GUN WITH A COMBINED SEAR AND COCKING MEMBER Mikkel Maerk, Lokken Verk, Norway Claims priority, application Norway May 13, 1947 7 Claims. (Cl. 42-10) This application is a division of my copending application Ser. No. 283,710 dated April 22, 1952, now Patent No. 2,699,007, January ll, 1955, which is a continuation in part of my copending prior application Ser. No. 23,765 dated April 28, 1948, now Patent No. 2,699,006, January 11, 1955.

The present invention relates to tire arms of the repeater gun type, in which loading and cocking are brought about by manually moving a slidable gun barrel from its rearmost breech-closing position first forwardly and thereupon rearwardly back into its rearmost position ready for tiring.

A repeater gun according to the present invention cornprises in combination a gun stock butt-end part, a breech casing attached to this part, a breech block unit movable in a longitudinal direction in the breech casing, a barrel slidably mounted in the breech casing, and a firing mechanism having a cocking member constructed and arranged to be actuated by the barrel through the intermediary of the movable breech block unit.

In a preferred embodiment of the invention the breech block fore end part or heacLis caused to be attached to the barrel by being lifted transversely to the barrel axis during its rearward movement in the breech casing. To fasten the breech block head to the barrel during this transversal movement the breech block head is suitably provided with projections to fit into locking grooves in a rearward extension of the barrel.

A gun constructed in accordance with the invention is illustrated by way of example in the accompanying drawmg.

In the illustrated example the invention is shown as applied to a single barrel shot gun.

In the drawing Fig. l is a side elevation of the gun in section, with the breech mechanism closed.

Fig. 2 is an inside View of the right hand cover plate of the breech casing. The breech mechanism is presumed to be closed and secured by the sear, at the moment the hammer strikes the firing pin.

Fig. 3 is a longitudinal sectional, vertical sectional view of the gun, with the breech mechanism open.

Fig. 4 is a transverse sectional view of the rear part of the breech (on line lV-IV Fig. 5, in the direction of the arrows).

Fig. 5 is a side elevation of the barrel and breech mechanism with breech closed.

Fig. 6 is a front elevation of the breech block.

Fig. 7 is a side elevation of the breech block.

Fig. 8 is a side view of a slide on which the breech block is mounted.

Figs. 9 and l0 are side views of the slide.

Fig. l1 is an outside view of the plate illustrated in Fig. 2, with a stop device for the slide.

Fig. 12 is a side elevation of the stop device for the slide illustrated in Fig. 11, shown in its arresting position.

Fig. 13 is a transverse sectional view of the breech atent block and breech casing (on line XIII-XIII of Fig. 14, in the direction of the arrows).

Fig. 14 is a side elevation of the gun partly in section, with the breech in a partly closed position.

In the example illustrated in the drawing the letter A designates the gun barrel attached to the fore end part 36 of the gun stock. B is the breech casing on which the barrel A is slidably mounted. The casing B is secured to the butt end stock C in such a manner that these parts are capable of being readily separated from one another.

In the rear part of the breech casing B the breech block member 2 is slidably mounted. In. the fore end of a forward elongation of the breech casing there is mounted a movable stop member 33 for limiting the forward movement of the barrel A.

Tile breech casing B is constructed as a cartridge magazine and is provided at the bottom with a cartridge lifter 30 in front of the breech block member 2.

The breech block assembly The breech block comprises a fore end part or head 2 and a rearwardly extending tail movably attached to a slide 7 movable in guides in the breech casing B in a direction parallel to the barrel axis. To this slide 7 is linked a combined sear and cooking member 11, 11a, 11b. The slide 7 has the shape of an upright plate and is guided in its movement in a groove 16 (Fig. 4) in the wall 6 of the breech casing. On its right hand side the slide 7 carries the extractor 28 and a spring-actuated stop latch 13 pivotally secured to the slide below a screw bolt 19, which also fastens the extractor 28 to the slide.

The latch 13 serves to arrest the slide 7 in its foremost position in the casing in the course of the loading operation.

On its left hand side the slide 7 carries the cocking member 11 functioning also as a locking latch pivotally fastened to the foremost part of the slide by means of a pivot pin 11C.

The slide 7 is provided with a stop member 14 on the rearmost end of the slide, serving to stop the slide in its forward movement. In the foremost end the slide is constructed with a vertical guide block (or rail) 10 to couple the breech block 2 to the slide and enable the breech block to move also transversely (or perpendicularly) to the movement of the slide. To guide the breech block in this movement a guiding groove 8 (or cam slot) is provided in the breech block tail and also a guiding groove (or cam slot) 9a in the wall 6a of the breech casing (Fig. 14). Corresponding cam pins 8a and 9 on the casing Wall and on the breech block tail respectively cooperate with these cam slots.

The cooking and jrng mechanism The ring sear member 11 is linked to the slide 7 at 11c (Fig. 8) and is actuated by a spring (not shown in the drawing) having the tendency to press the sear member 11 downwards.

The hook or latch nib 11a is adapted to engage a corresponding notch 12b in the hammer 12. The sear member is constructed with a notch 11b to engage a lug 18 on the wall of the breech casing 6 and with a nose 11x at its rear end to engage a lug 20b on a safety latch 20, adapted to be actuated by ringer pressure (or a hand grip). On its rear end the slide 7 has a downward projection 14, adapted to engage the one (right hand) arm of a lever 15 pivotecl at 17. The other (left hand) arm of this lever 15 engages a notch 12a on the side face of the hammer 12. This lever functions as a stop member for the slide 7 to releasably hold same in its rearmost position. The hammer 12 s pivotally mounted on the same bolt 24 as the trigger 23. The hammer 12 is actuated by the main spring 26, one end of which engages a notch 12e in the hammer.

When the breech block 2 and slide 7 are driven backwards by means of a backward movement of the gun barrel, the latch 11a on the sear member 11 engages the notch 12b in the hammer 12 and moves the hammer backwards into cocked position. The one arm of lever 15 on a slidable connection with the hammer engages projection 14 on slide 7 and holds same locked in its rearmost position. When the trigger 23 is pulled, the arm of the trigger lifts the sear member and the sear latch 11a leaves notch 12b in the hammer, thereby releasing this latter.

Operation of the cockng mechanism When the barrel is moved in a backward direction and a new cartridge has entered the cartridge chamber in the barrel, the breech block head 2 has also been brought into its proper locking position in the barrel extension 1.

In the backward movement of the barrel, the rear part of the guide blocks 52 of the barrel extension abuts against the breech block locking latch 13 on the slide 7 and in its further backward movement unlocks the slide 7 as well as the breech block. The combined sear and cocking member catches with its hook or sear nib 11a into the notch 12b on the hammer and in the course of the continued backward movement cocks the hammer. During this movement of the barrel, breech block and slide the sear member is under control of the lug 18 until the notch 11b has passed lug 18. Before the sears nib 11a has reached so far, however, its nose 11x has entered in below the lug 20b and is guided in its further travel backward by this lug 20b until the hammer is cocked.

In the nal part of the backward movement of the barrel the lever 15 ascends to under the lug 14 on the slide 7 and the breech block will have entered into its chamber in the barrel extension vertically to the axis of the barrel on account of the sloping form of the guide surfaces. The whole mechanism is now in a locked position, and the gun is ready for use.

Firing operation When the gun is to be red, the button 50 on the safety arm 20a is depressed by the operators hand grip around the stock/and the sear 11 will be released from the hook 20 at the same time as the pressure on the trigger is transferred to the sear 11 and lifts it so that notch 11b will catch over projection 18 and arrest the slide 7 in its forward movement, while the nib 11a is released from its engagement with the hammer. The hammer now strikes against the ring pin 5. In the course of the movement of the hammer, the lever 15 is released from its engagement with the slide 7, which is now held only by means of the Sear 11, until the pressure of the nger on the trigger ceases.

At this moment the sear 11 by means of a spring is pressed back to its original position, and the notch 11b disengages lug 18, so that the barrel is ready for a new loading manipulation. When the barrel is now again moved forward, the breech block head is still in its locked position in its chamber in the barrel extension, and owing to the horizontal direction of the corresponding part of the guide surfaces of the breech block, the position of the breech block head 2 in its chamber is not altered before the inclined part of the guide surface is reached, but in the course of the continued forward movement of the barrel the breech head travels out of its chamber in a direction perpendicular to the barrel axis, and when the recoil lugs get out of the grasp of the breech block chamber, it will be in its foremost position in the breech casing. The slide 7 and consequently also the breech block 2 will then be fastened in this position by means of the latch lever 13. This stop lever 13 is hinged on a screw 19 fastened to the slide 7. The

rear arm of this lever 13 is pressed down on lug 13a by a spring (not shown in the drawing), and when the breech block is in its foremost position, the rear arm of latch 13 will snap down in front of lug 13a on the casings wall 6 and arrest the breech block.

In the course of the further forward movement of the barrel, the empty cartridge is thrown out and the loading operation takes place.

When the gun is opened for the purpose of removing cartridges by depressing the button 22, this latter abuts against the lever 15 and releases same from its engagement with the projection 14 on the slide 7. The hammer which is now locked in its engagement with the sear latch, pushes the slide and the breech block forward and out of engagement with the walls of the breech block chamber in the barrel extension. When the operator moves the barrel further forward, the extractor will pull the cartridge out of the barrel. The cartridge in the barrel will then be tilted up and can be removed.

The gun in use The illustrated gun is loaded and cocked by moving the barrel by a movement of the operators hand forward to its foremost position and then backwards to its rearmost position in relation to the butt-end stock. An empty cartridge shell in the cartridge chamber of the barrel is extracted and ejected in the course of this manipulation. The cartridge feeding mechanism of the gun is actuated by the same manipulation.

When the gun is to be used, a cartridge may be inserted by hand directly into the cartridge chamber in the barrel, but the simplest way is to insert a `cartridge into the magazine through the opening 55 and 56 in the fore-end stock and the casing. By means of depressing the pressure button 22 at the right hand side of the trigger, the barrel is unlocked, and by a movement with the hand the operator slides the barrel forwardly until it abuts against the arresting block 33 provided for this purpose. In the course of this movement of the barrel, the breech block travels out of its chamber in the barrel extension and the spring of cartridge lifter 30 pushes the foremost end of the cartridge up between the guide rails 32 on top of the inside Walls of the trough-shaped casing into the breech block chamber in the barrel extension, while the rear part of the cartridge is kept down by means of the guide rails 32, as shown in Fig. 3. When the barrel is now pulled back into its original position, the cartridge is pushed backwardly until its head (rim) is no longer in contact with the guide rails 32, whereby the cartridge is allowed to be raised by means of the cartridge lifter up into its position in alignment with the cartridge chamber. It then abuts against the breech block 2 and is carried forward and into its chamber in the barrel. The breech block head 2 is then immediately below its locking grooves in the barrel extension. In the course of the last part of the backward movement of thc barrel, the breech block enters vertically up into its locking grooves in the barrel extension and is locked in the same. The hammer is cocked and locked. The gun is now ready for a new firing, and a new cartridge is therefore inserted into the magazine. When the shot has been fired, the barrel still remains locked in its rearmost position, until the pressure of the operators finger on the trigger 23 ceases. The barrel will then be unlocked, and the loading manipulation can be repeated by moving the barrel forward and then back again. In the course of the forward movement of the barrel the breech block 2 descends and leaves the grooves in the barrel extension. At the same time the extractor draws the empty cartridge case out of the cartridge chamber in the barrel, and the front end of the new cartridge in the magazine is swung up and butts against the empty cartridge, so that the latter is thrown out. The operations are then repeated as above explained.

I claim:

1. In a repeater gun of the type in which loading and cocking are brought about by manually moving a slidable barrel axially from its rearmost breech-closing position in the gun, first forwardly and then rearwardly back into its rearmost position ready for firing, the combination of a breech casing, on which the barrel is slidably mounted; a breech block rearwardly slidable in said casing; a hammer pivoted on a stationary part of said casing; a combined sear and cocking member to cock and to engage said hammer to hold same in cocked position, said member being slidable longitudinally in said breech casing, and having its forward end attached to said breech block, so that the rearward movement of said breech block causes the sear to engage said hammer and move same into cocked position for ring; and a trigger pivoted in said casing and adapted to engage said member to move same from engagement with said hammer to bring about firing of the gun.

2. A repeater gun, according to claim 1, in which a slide movable in said breech casing parallel to the axis of the barrel attaches said combined sear and cocking member to said breech block, said breech block being mounted on said slide and movable thereon relative to the axis of the barrel.

3. A repeater gun, according to claim 1, in which a slide movable in said breech casing parallel to the axis of the barrel attaches said combined sear and cocking member to said breech block, said breech block being mounted on said slide and movable thereon transversely to the barrel axis, said slide having vertical guiding members to which said breech block is slidably attached and movable thereon perpendicularly to the barrel axis.

4. A repeater gun, according to claim 1, having a horizontal pivot on which said hammer and said trigger are mounted,

5. A repeater gun, according to claim 1, in which a slide movable in said breech casing parallel to the axis of the barrel attaches said combined Sear and cocking member to said breech block, and having a stop lever hinged to said breech casing, said hammer having on its side face a cam slot in which said lever engages and functions as a stop for said slide when the hammer is cocked.

6. A repeater gun, according to claim l, in which said combined sear and cocking member has a rearwardly extending part having a stop member, and having a second stop member on a stationary part of said breech casing to engage said iirst stop member when said sear and cocking member is actuated by said trigger to be disengaged from said hammer, thereby preventing forward movement of said breech block as the trigger is pressed.

7. A repeater gun, according to claim l, having a movable safety member accessible from outside of the gun, a movable member hinged to said breech casing and being actuated by said safety member, and a stop lug carried by said hinged member, said combined scar and cocking member having a rearwardly extending part having at its rear end a member to be engaged by said stop lug when the hammer is cocked.

References Cited in the tile of this patent UNITED STATES PATENTS 472,377 Mallen Apr. 5, 1892 487,659 Browning Dec. 6, 1892 490,065 Bye et al Ian. 17, 1893 797,420 Febiger Aug. 15, 1905 891,778 Mertens June 23, 1908 1,806,736 Browning May 26, 1931 2,418,946 Loomis Apr. 15, 1947 

